21
Alarm Signals
Alarm Code
Alarm
Sound
Problem
Reset Options
E4
6 beeps
every ten
seconds
High Pressure Alarm
Compressor discharge pressure is
outside of the normal operating range.
The high pressure switch has been
triggered 3 or more times in 1 hour. The
air filter and/or condenser may need
cleaning.
Clean the air filter and/or condenser if
necessary. Press "RESET." If the high
pressure switch resets automatically, the
alarm will be silenced and "E4" will clear.
If the high pressure switch trips 5 times
in 1 hour, the compressor will stop and
will not re-start. A service technician must
be called. After the 5th pressure trip,
the alarm can be silenced for 1 hour by
pressing "RESET."
E6
8 beeps
every ten
seconds
High Voltage Alarm
Line voltage has been too high for
at least 10 seconds. To protect the
compressor, the compressor has shut
down.
The alarm automatically resets when
acceptable voltage is detected.
Press "RESET" to silence the alarm for
5 minutes. If this alarm occurs frequently,
call a qualified service technician.
E7
9 beeps
every ten
seconds
Low Voltage Alarm
Line voltage has been too low for at least
10 seconds. To protect the compressor,
the compressor has shut down.
The alarm automatically resets when
acceptable voltage is detected.
Press "RESET" to silence the alarm for
5 minutes. If this alarm occurs frequently,
call a qualified service technician.
E8
Constant
buzzer
Cabinet Temperature Sensor Malfunction
Alarm
Cabinet temperature sensor has failed.
Call a qualified service technician.
During alarm, press "RESET" to silence
the buzzer for 5 minutes.
E9
Constant
buzzer
Defrost Temperature Sensor Malfunction
Alarm
Defrost temperature sensor has failed.
Call a qualified service technician.
During alarm, press "RESET" to silence
the buzzer for 5 minutes.
CF
1 beep
every ten
seconds
Clogged Filter Alarm
Condenser temperature is outside of
normal operating range.
Air filter and/or condenser require
cleaning.
Clean the air filter and/or condenser.
Allow time for the sensor to reset, then
press "RESET."
During alarm, press "RESET" to silence
the alarm for 2 hours.
If this alarm occurs frequently, call a
qualified service technician. Failure
to take action when this alarm
activates could result in damage to the
compressor.
door
(except
units with
heated
glass doors)
2 beeps
every ten
seconds
Door Alarm
Display Only: Door open.
Both Display and Beeps: Door open
longer than 3 minutes.
Close the door. During alarm, press
"RESET" to silence the buzzer for
3 minutes.
2. SafeTemp Models
There are no alarms on SafeTemp models.
